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What type of cross drainage work is provided when the canal runs below the drain, with FSL of canal well below the bed of the drain?

What type of cross drainage work is provided when the canal runs below the drain, with FSL of canal well below the bed of the drain? Correct Answer Super passage

The hydraulic structure in which the drainage is passing over the irrigation canal is known as super passage. This structure is suitable when the bed level of drainage is above the flood surface level of the canal. The water of the canal passes clearly below the drainage.

Types of Cross - Drainage Works:

(1) Type I (Irrigation canal passes over the drainage)

(a) Aqueduct

(b) Siphon aqueduct

(2) Type II (Drainage passes over the irrigation canal)

(a) Super passage

(b) Siphon super passage

Super Passage

In the super passage, the bed level of the drainage is above the full supply level of the canal.

The super passage is just the opposite of the aqueduct.

The canal flows at atmospheric pressure under the work.

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